NAVIGATION MEMBERS COURSE REGISTER DEMO

SCREEN PRINTING EVALUATION QUIZ

Please do not make a blind guess or randomly select the answers to these questions, as it is a measure of what you know, and not how lucky you are.

1) How many mesh openings are there in one square centimetre of 120 Mesh? a) 120. b) 240. c) 14,161. d) 1,440.

2) Who is responsible for Health and Safety? a) The Managing Director. b) The Safety Officer. c) Personnel Department. d) Everybody.

3) If the net profit of the company is 10% and you create 10 rejects how many items do you have to print to pay for the cost of those rejects? a) 1. b) 10. c) 20. d) 100.

4) When does stencil thickness have the greatest effect? a) When printing fine detail. b) When printing large areas. c) When printing on textured surfaces. d) When printing gloss surfaces.

5) Why is it important to control the ink deposit of UV curing ink? a) To control the colour. b) To ensure the ink cures fully. c) To control the dot gain or dot loss. d) To minimise changes in image size of the print.

6) What is the most likely cause of colour change during a print run? a) Wear on squeegee. b) Wear on the mesh. c) Wear on the flood coater. d) Wear on the emulsion.

7) What is the function of the squeegee? a) Charge the mesh openings with ink prior to printing. b) Stop ink drying in the mesh. c) Bring the stencil into contact with the substrate and cause the ink to flow through the mesh. d) Removes the excess ink from the screen during printing.

8) How many colours can the normal human eye see? a) 16 million. b) 10,000. c) 1,000. d) 256.

9) Which hydrocarbon based solvent can be allowed into the drains? a) Any. b) All screen cleaning products. c) Depends on the manufacturers recommendation. d) None.

10) What is the main cause of damage to the stencil? a) Incorrect exposure of the stencil. b) Incorrect cleaning of the stencil. c) Press is running too quickly. d) Flood coater is set incorrectly.

11) If you get solvent or ink in your eye, what should you do? a) Use eye wash with Optrex or similar product. b) Wash out with water. c) If it stings wash out with water or Optrex and go to the doctor. d) Wash with copious amounts of water for 15 minutes and seek medical assistance if eye is still stinging, providing the relevant Health & safety sheet for the product.

12) What is the difference between a thinner and a retarder? a) Retarder does not make the ink as thin as a thinner. b) A thinner evaporates more quickly than a retarder. c) A retarder evaporates more quickly than a thinner. d) A thinner smells less than a retarder.

13) Other than stabilisation of the mesh after stretching what condition is most likely to cause loss of tension? a) Too strong a frame. b) Excessive use of thinners. c) Excessive snap distance. d) A hard squeegee.

14) Which colour UV ink cures the fastest? a) Green. b) Blue. c) Red. d) White.

15) What gas is produced when using UV curing systems? a) Oxygen. b) Ozone. c) Hydrogen. d) Carbon Monoxide.

16) What should you do before using a new ink type? a) Read the instructions on the container. b) Follow the sales reps instructions. c) Read the Health & Safety data sheet and the Technical data sheet. d) Read the Health & Safety data sheet.

17) What are the three materials that mesh can be made from? a) Silk, polyester, cotton. b) Nylon, steel, polythene. c) Silk, rubber, nylon. d) Nylon, steel, polyester.

18) What is a micron? a) A wavelength of light. b) 0.001 mm. c) 0.0001 mm. d) 0.0001 inch.

19) How soon after printing can you dress a squeegee? a) Immediately. b) 10 minutes. c) 1 hour. d) 24 hours.

20) Which three are the main causes of dot gain? a) High stencil Rz value; Too much squeegee pressure; Rounded flood coater profile. b) Dots on the positive are too big; Wrong floodcoater profile; Machine is running too slow. c) Dots on the positive are too big; Ink is too thick; Incorrect stencil exposure. d) Low stencil Rz value; Too much squeegee pressure; Machine is running too slow.

YOUR DETAILS

(Use Tab Key or Mouse to move between Name, Position, and Email Address) Name: Position: Email Address: Date/Time: (This button only works once per attempt so be sure of your answers before pressing)